Airline employee killed at Oklahoma City airport; manhunt underway

(CNN) -- A manhunt was underway at Will Rogers World Airport in Oklahoma City after a Southwest Airlines employee was fatally shot Tuesday in the parking lot.

The airline said, "The Southwest Airlines Family is deeply saddened by the passing of our Southwest Family Member, and we extend our heartfelt sympathies and support to his family and Southwest coworkers at this time."

The victim is Michael Winchester, the Oklahoma City Police Department tweeted on its verified account. He was believed to be 51.

The airport has been closed to commercial traffic since the shooting, though one government plane landed.

Police advised anyone inside the facility to "shelter in place," a tweet from the department said. Police said they were moving people from inside the airport to a nearby road.